This is a hot topic in the Classical Physics forum on scienceforums.com. don't know if you're interested but I have developed a device that looks suspiciously like a free energy device and it has, as I say, sparked off quite an interesting discussion. Here's a link to my page about the device: http://tomboy-pink.co.uk/SFT/ (soon it will be on an Https link but I'm in the middle of transferring the domain atm, so meanwhile just ignore browser complaints that the site's insecure.)